Thread protector



Aug. 23, 1927. 1,639,814

P. J. SHRUM ET AL THREAD PROTECTOR Original Filed ly 15 1922 Patented Aug. 23, 1927.

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firlginal application filed July 15, 1922, Serial Io. 575,167. Divided and this application fled June 89, i

" 1823. Serial IOLMSADS. V 7

Our invent-ion consists in an improvement in thread protectors and has for. its object to provide a device of this class formed of a continuous integral ring provided with interior securing threads, a terminal retaining annular lip or flange, and an opposite outwardly extended terminal coping or pro-- tecting portion, as shall be more fully hereinafter described.-

The device is formed preferably from a section of tubing, either seamless or welded, by the operation forming the subject matter' of a prior patent of Harold A. Henigen and myself, No. 1,475,032, of which this application is a division.

The device is illustrated in the accompanying drawing, in which:

Fi 1 is a longitudinal sectional view through the threaded end portion of a pipe provided with a protector as applied;

Fig. 2, an outer end view of the protector; and

Fi 3, an enlarged sectional detail view showm the device as applied and of substantia y full size.

The main body is composed of a cy 'ndrical blank formed in the manner and by the means disclosed in the prior applicatlon above referred to, or 80 in any other suitable manner providing an inwardly swaged thickened middle portion for threading. The middle section 2 of the protector constitutes the attaching or engagmg portion ofthe device having the series of threads 3 for engagement with the threads of a pipe 4 or other article to be protected. Threads 3 extend for suflicient length longitudinally of the middle portion of the protector for firm doimection, by screwing and throughout substantially the thickened portion ofthe device, when the -blank is made by the method of inward swaging of said application.

The outer end ortion of the device is outwardly enlarge peripherally by a laterally extending bul ous rounded rin 5 j spaced away beyond the zone of three s 3 and providing an interior clearance or nonatta ing space 6. Rounded portion 5 is ortion of the protector turned abruptly inwardly beyond the threaded zone, providing the' terminal annular lip or edge 7, adapted to abut against the outer end of pipe 4, when screwed up tight, as shown.

Ring 5, which is the portion of the protector of largest outside diameter, provides an annular outer hearing which completely surrounds and protects the outer threaded portion of the pipe, and by which it maybe rolled or subjected to-the rough handling of shipment, storage, etc. without injuring the threads. Theother end oftheprotector is laterally larger than the middle threaded section-suflicient to leave a clearance space 8 between its inner unthreaded surface and the pipe threads. As thus made, the laterally arger inner end portion 9 extends beyond the attaching portion, in the manner of a skirt or sleeve which projects over or beyond the innermost threaded portion of the ipe, completely protecting such threads rom injury at all times.

The inside diameter of the distal end or mouth of the skirt 9 is materially greater than the inside diameter of the ipe, so that the protector may be readily s lipped over the end of the p'pe preliminary to screwing the protector onto the threads.

In construction, the device is formed in any suitable manner, as by swaging, from a cylindrical ring blank, to form the middle contracted thickened portion and the enlarged end portions, with the inwardly turned retaining lip.

The middle section is then tapped to cut the threads 3 of suitable size for intended use, when the protector is ready for screwing on the pipe to be protected.

By reason .of its annular reinforcing enlargements, we are enabled to make the protector of metal of minimum gauge or thickness, due to its added bracing strength, and with corresponding economy. The device may be made in any desired size or dimensions; it is very stron and durable, well adapted to the purpose in view, and ca able of repeated use. It may be made in di erent proportions from those shown, or changed in detail construction by the skilled mechanic, but all such changes are to be considered as within the scope of the following claims,

a skirt at one end of said threaded Vhat we claim is: v

1. A thread protector consisting of a single continuous metallic sleeve having an in termediate cylindrical thickened interiorly threaded portion of reduced diameter, a skirt at one end of said'threaded portion adapted to extend'over threads to be protected and out of engagement therewith, said skirt having an inside diameter which is materially greater than that of the outside diameter of the threads to be protected thereby and theinside diameter of the mouth of the skirt being of sufficiently greater diameter than the outside diameter of the threaded article to be protected to permit the skirt of the protector to be readily slipped over the end of such article preliminary to screwing it onto the threads, andan outwardly flared terminal portion at the other end of the intermediate portion terminating in an inturned flange adapted to form a protection for the end of the threaded article to which the protector is applied.

2. A pipe thread protector consisting of a metallic sleeve having an interiorly threaded intermediate cylindrlcal portion adapted to be screwed onto and protect the intermediate portion of the pipe threads to be protected, ortion adapted to extend over threads to e prothe protector may be readily applied over' the end of the pipe preliminary to screwing the protector onto the threads, and an outwardly flared terminal portion at the other end of'the intermediate portion terminating in an inturned flange adapted to form a tection for the end of tector is applied.

3. A one-piece thread protector formed from a section of tubing and havin an inpropipe to which the -protermediate cylindrical portion provided with a plurality of screw threads formed on the interior thereof, said tubing at one end being unthreaded and fiared' to form a skirt adapted to extend over and out of contact with-threads to be protected, the inside dianleter of the mouth of the skirt being suflicient to permit the same to be readily slipped over the end of the threaded article to be protected preliminary to screwing it onto the threads of the article, said tubingat the opposite end from said skirt beingbulged outwardly and then turned inwardly to form a stop for contact with the end of the article to be protected. v

In testimony whereof we hereunto aifix our signatures.

PETER J. SHRUM. HAROLD A. HENIGEN 

